I would just increase the humidity to correct levels 65% @ 80ºF roughly. (that is the same as @76ºF around 74%RH and @84ºF around 58% RH.) A large retic can be quite a handful, soaking one is quite an operation. If you choose to do so a spotter is not a bad idea, they can jump in and help if things go wrong. Soaking before a shed is a terrible idea, it usually leads to a bad shed generally so I would not. I would concentrate on getting the humidity correct. Remember RH is relative humidity, it is relative to the saturation point (which changes with temperature) And is expressed as a % of a variable number, it has to change as air temps change.